PT-2015-7739 · Ntf+7 · Ntp+11

Jonathan Gardner · Published 2015-12-31 · Updated 2024-06-15 · CVE-2015-8138

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions NTP versions 4.2.8p6 and earlier, NTP versions 4.3.x before 4.3.90 NTP (affected versions not specified) in multiple Cisco products

Description The issue allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero, potentially causing a denial of service (DoS) condition or modifying the time being advertised by a device acting as a Network Time Protocol (NTP) server. This vulnerability exposes the possibility of a logic error.

Recommendations For NTP versions 4.2.8p6 and earlier, update to version 4.2.8p6 or later. For NTP versions 4.3.x before 4.3.90, update to version 4.3.90 or later. For NTP in multiple Cisco products, refer to the Cisco bug for each affected product for available workarounds. As a temporary workaround, consider restricting access to the NTP service to minimize the risk of exploitation.

Exploit

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2017-2335

CESA-2016_0063

CVE-2015-8138

DLA-559-1

DSA-3629-1

MGASA-2016-0039

OPENSUSE-SU-2016_1292-1

OPENSUSE-SU-2024:10181-1

RHSA-2016:0063

RHSA-2016_0063

SUSE-SU-2016:1175-1

SUSE-SU-2016:1177-1

SUSE-SU-2016:1247-1

SUSE-SU-2016:1311-1

USN-3096-1

Affected Products

Alt Linux

Centos

Cisco

Cisco Ios

Cisco Ios Xe

Cisco Ios Xr

Cisco Nexus

Freebsd

Ntp

Red Hat

Suse

Ubuntu

References · 291

• 🔥 https://github.com/opsxcq/exploit-CVE-2016-7434 · Exploit
• https://bdu.fstec.ru/vul/2017-02017 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2516 · Security Note
• https://security-tracker.debian.org/tracker/source-package/ntp · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00038.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2015-7974 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161123-ntpd · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4953 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7703 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7702 · Security Note
• https://bdu.fstec.ru/vul/2017-02039 · Security Note
• https://linux.oracle.com/errata/ELSA-2016-0063.html · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7705 · Security Note
• https://osv.dev/vulnerability/USN-3096-1 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7979 · Security Note